<s>
Dell	B-Device
EMC	I-Device
VMAX	I-Device
is	O
Dell	O
EMC	O
’s	O
flagship	O
enterprise	O
storage	O
array	O
product	O
line	O
.	O
</s>
<s>
It	O
evolved	O
out	O
of	O
the	O
EMC	B-Device
Symmetrix	I-Device
array	O
,	O
EMC	O
’s	O
primary	O
storage	O
product	O
of	O
1990s	O
and	O
early	O
2000s	O
.	O
</s>
<s>
Symmetrix	B-Device
was	O
EMC	O
Corporation	O
's	O
flagship	O
product	O
from	O
1990	O
,	O
when	O
it	O
first	O
shipped	O
,	O
until	O
2003	O
when	O
the	O
Direct	O
Matrix	O
Architecture	O
(	O
DMX	B-Device
)	O
product	O
line	O
was	O
introduced	O
to	O
replace	O
it	O
.	O
</s>
<s>
The	O
first	O
Symmetrix	B-Device
systems	O
were	O
storage	O
arrays	O
connected	O
to	O
an	O
IBM	O
mainframe	O
via	O
the	O
block	O
multiplexer	O
channel	O
.	O
</s>
<s>
Newer	O
generations	O
of	O
Symmetrix	B-Device
brought	O
additional	O
host	O
connection	O
protocols	O
which	O
include	O
ESCON	O
,	O
SCSI	O
,	O
Fibre	O
Channel-based	O
storage	O
area	O
networks	O
(	O
SANs	O
)	O
,	O
FICON	O
and	O
iSCSI	O
.	O
</s>
<s>
The	O
1995	O
release	O
of	O
Symmetrix	B-Device
3000	O
was	O
recognized	O
as	O
the	O
first	O
open	O
system	O
to	O
connect	O
to	O
mainframe-class	O
storage	O
over	O
standard	O
SCSI	O
protocols	O
.	O
</s>
<s>
The	O
Symmetrix	B-Device
product	O
was	O
initially	O
popular	O
within	O
the	O
airline	O
industry	O
and	O
with	O
companies	O
that	O
were	O
willing	O
to	O
deviate	O
from	O
the	O
safety	O
of	O
IBM	O
's	O
3390	O
disk	O
subsystem	O
and	O
take	O
a	O
risk	O
with	O
the	O
unproven	O
Symmetrix	B-Device
array	O
.	O
</s>
<s>
Moshe	O
Yanai	O
managed	O
the	O
Symmetrix	B-Device
development	O
from	O
the	O
product	O
's	O
inception	O
in	O
1987	O
until	O
shortly	O
before	O
leaving	O
EMC	O
in	O
2001	O
,	O
and	O
his	O
Symmetrix	B-Device
development	O
team	O
grew	O
from	O
several	O
people	O
to	O
thousands	O
.	O
</s>
<s>
The	O
Direct	O
Matrix	O
Architecture	O
(	O
DMX	B-Device
)	O
product	O
line	O
was	O
announced	O
in	O
February	O
2003	O
.	O
</s>
<s>
In	O
2009	O
,	O
EMC	O
introduced	O
the	O
Virtual	O
Matrix	O
Architecture	O
,	O
which	O
was	O
a	O
re-design	O
of	O
the	O
DMX	B-Device
architecture	O
to	O
reflect	O
the	O
ongoing	O
virtualization	O
trend	O
.	O
</s>
<s>
The	O
new	O
architecture	O
could	O
support	O
“	O
hundreds	O
of	O
thousands	O
of	O
terabytes	O
of	O
storage	O
and	O
millions	O
of	O
IOPS	O
(	O
input/output	O
per	O
second	O
)	O
supporting	O
hundreds	O
of	O
thousands	O
of	O
VMware	O
and	O
other	O
virtual	O
machines	O
in	O
a	O
single	O
federated	O
storage	O
infrastructure.	O
”	O
VMAX	O
(	O
then	O
called	O
EMC	B-Device
Symmetrix	I-Device
V-Max	O
)	O
was	O
the	O
first	O
storage	O
system	O
to	O
support	O
this	O
new	O
scale	O
out	O
architecture	O
offering	O
from	O
1	O
engine	O
to	O
8	O
engines	O
of	O
expansion	O
.	O
</s>
<s>
The	O
core	O
components	O
of	O
the	O
Symmetrix	B-Device
Direct	O
Matrix	O
Architecture	O
consisted	O
of	O
two	O
back-end	O
director	O
boards	O
,	O
two	O
memory	O
boards	O
,	O
and	O
two	O
front-end	O
boards	O
.	O
</s>
<s>
The	O
system	O
grows	O
by	O
aggregating	O
up	O
to	O
eight	O
Symmetrix	B-Device
VMAX	O
engines	O
in	O
a	O
single	O
system	O
with	O
fully	O
shared	O
connectivity	O
,	O
processing	O
,	O
memory	O
and	O
storage	O
capacity	O
resources	O
.	O
</s>
<s>
The	O
Symmetrix	B-Device
Remote	I-Device
Data	I-Device
Facility	I-Device
(	O
SRDF	B-Device
)	O
facilitates	O
data	O
replication	O
between	O
VMAX	O
arrays	O
through	O
a	O
storage	O
area	O
network	O
(	O
SAN	O
)	O
or	O
Internet	O
Protocol	O
(	O
IP	O
)	O
network	O
.	O
</s>
<s>
SRDF	B-Device
logically	O
pairs	O
a	O
device	O
or	O
a	O
group	O
of	O
devices	O
from	O
each	O
array	O
and	O
replicates	O
data	O
from	O
one	O
to	O
the	O
other	O
synchronously	O
or	O
asynchronously	O
.	O
</s>
<s>
SRDF/Metro	O
was	O
introduced	O
in	O
2016	O
to	O
provide	O
active	O
/	O
active	O
data	O
center	O
replication	O
across	O
metro	O
distances	O
of	O
100KM	O
.	O
</s>
<s>
A	O
later	O
HYPERMAX	O
OS	O
refresh	O
added	O
SRDF/Metro	O
with	O
virtual	O
witness	O
and	O
asynchronous	O
third-site	O
disaster	O
recovery	O
protection	O
.	O
</s>
